GSTDTAP  > 地球科学
DOI10.1130/B31460.1
Aquifer recharge, depletion, and connectivity: Inferences from GRACE, land surface models, and geochemical and geophysical data
Mohamed, Ahmed1,2; Sultan, Mohamed1; Ahmed, Mohamed1,3; Yan, Eugene4; Ahmed, Ezzat2
2017-05-01
发表期刊GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN0016-7606
EISSN1943-2674
出版年2017
卷号129
文章类型Article
语种英语
国家USA; Egypt
英文摘要

Data from the Gravity Recovery and Climate Experiment (GRACE) and outputs of the CLM4.5 model were used to estimate recharge and depletion rates for large aquifers, investigate the connectivity of an aquifer's subbasins, and identify barriers and preferred pathways for groundwater flow within an aquifer system. The Nubian Sandstone Aquifer System and its subbasins (Dakhla, Northern Sudan Platform, and Kufra) in northeast Africa were used for demonstration purposes, and findings were tested and verified against geological, geophysical, remote sensing, geochronologic, and geochemical data. There are four major findings. (1) The average annual precipitation data over recharge areas in the southern Kufra section and the Northern Sudan Platform subbasin were estimated at 54.8 km3, and 32.8 km3, respectively, and knowing the annual extraction rates over these two areas (similar to 0.40 +/- 0.20 km(3)), recharge rates were estimated at 0.78 +/- 0.49 km(3)/yr and 1.44 +/- 0.42 km(3)/yr, respectively. (2) GRACEderived groundwater depletion rates over the Dakhla subbasin and the Northern Kufra section were estimated at 4.44 +/- 0.42 km(3)/yr and 0.48 +/- 0.32 km(3)/yr, respectively. (3) The observed depletion in the southern parts of the Dakhla subbasin is apparently caused by the presence of the east- west- trending Uweinat-Aswan basement uplift, which impedes the south-to-north groundwater flow and hence reduces replenishment from recharge areas in the south. (4) A major northeast- southwest- trending shear zone (Pelusium shear system) is apparently providing a preferred groundwater flow pathway from the Kufra to the Dakhla subbasin. Our inte-grated approach provides a replicable and cost-effective model for better understanding of the hydrogeologic setting of large aquifers worldwide and for optimum management of these groundwater resources.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000403309300002
WOS关键词NUBIAN SANDSTONE AQUIFER ; NORTHERN RED-SEA ; GROUNDWATER-FLOW ; WESTERN DESERT ; WATER ; PRECIPITATION ; VARIABILITY ; DISCHARGE ; GRAVITY ; BASINS
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/24648
专题地球科学
作者单位1.Western Michigan Univ, Dept Geosci, Kalamazoo, MI 49008 USA;
2.Assiut Univ, Geol Dept, Fac Sci, Assiut 71516, Egypt;
3.Suez Canal Univ, Geol Dept, Fac Sci, Ismailia 41522, Egypt;
4.Argonne Natl Lab, Environm Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA
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GB/T 7714
Mohamed, Ahmed,Sultan, Mohamed,Ahmed, Mohamed,et al. Aquifer recharge, depletion, and connectivity: Inferences from GRACE, land surface models, and geochemical and geophysical data[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129.
APA Mohamed, Ahmed,Sultan, Mohamed,Ahmed, Mohamed,Yan, Eugene,&Ahmed, Ezzat.(2017).Aquifer recharge, depletion, and connectivity: Inferences from GRACE, land surface models, and geochemical and geophysical data.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129.
MLA Mohamed, Ahmed,et al."Aquifer recharge, depletion, and connectivity: Inferences from GRACE, land surface models, and geochemical and geophysical data".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017).
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